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Forsythia Phenophase Definitions - Signs of the Seasons: A New England Phenology Program - University of Maine Cooperative Extension
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Forsythia Fact Sheet - Signs of the Seasons: A New England Phenology Program - University of Maine Cooperative Extension
Sakura Rosa Con Forsythia Gialla Alle Spalle Parco Hanamiyama Fukushima Giappone - Fotografie stock e altre immagini di Albero - iStock
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